The newspaper cited four Microsoft office locations visited by Chinese investigators from the State Administration for Industry and Commerce: Beijing, Shanghai, Guangzhou, and Chengdu. It is unclear what transpired during these visits, but the newspaper said "the investigation might have to do with antitrust matters." Reuters also reported that this could likely be the "preliminary stage of an antitrust investigation."

A Microsoft spokesperson confirmed these visits to Reuters – which used the word "visit" in its description, not "investigation" as the Chinese newspaper had – but declined to say why these inspections had occurred. Further clarification sought by The Monitor as to the nature of these visits was also declined.

In an e-mailed statement, a Microsoft spokesperson said, "We aim to build products that deliver the features, security, and reliability customers expect, and we will address any concerns the government may have," yet declined to give any additional information.

This comes at a time of difficulty for US technology companies operating in China. In the past year, China has targeted several companies, including Microsoft, for cooperating with the US government's spying program revealed last year by former NSA contractor Edward Snowden.

Following that revelation, US consumer tech giant Apple went back and forth with China after Chinese state media accused a feature on the Apple iPhone of posing a national security threat that could reveal important state secrets.

More recently, an article published last week by China's state-run Xinhua News Agency urged Chinese Internet companies to compete internationally, an example of how China is placing increasingly greater emphasis on domestic technologies as opposed to relying on foreign technologies. That article said that by moving abroad, Chinese Internet companies could provide an alternative to a market currently heavily dominated by American companies. Alternatives are needed, the article noted, due to international concerns raised by the Snowden leaks.

-Correction: An earlier version of this article misidentified the editorial stance of the South China Morning Post.